Figure 19 - Esophagogastric junction (EGJ) opening diameter during deglutitive relaxation.

The EGJ cross-sectional area was 0.5 cm wider among the hernia patients and gastroesophageal reflux disease (GERD) patients without hiatus hernia compared to the controls at every distention pressure above 0 mmHg. (Source: Pandolfino et al.,¹⁷ with permission from American Gastroenterological Association.)